JP2003089919A - Spinneret for conjugate spinning - Google Patents
Spinneret for conjugate spinningInfo
- Publication number
- JP2003089919A JP2003089919A JP2001279677A JP2001279677A JP2003089919A JP 2003089919 A JP2003089919 A JP 2003089919A JP 2001279677 A JP2001279677 A JP 2001279677A JP 2001279677 A JP2001279677 A JP 2001279677A JP 2003089919 A JP2003089919 A JP 2003089919A
- Authority
- JP
- Japan
- Prior art keywords
- spinneret
- partition plate
- discharge hole
- composite spinning
- viscosity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複合紡糸用口金に
関し、とくに、互いに溶融粘度の異なる２つの溶融重合
体からサイドバイサイド型の複合繊維を紡糸する複合紡
糸用口金に関する。TECHNICAL FIELD The present invention relates to a spinneret for composite spinning, and more particularly to a spinneret for composite spinning for spinning side-by-side type composite fibers from two melt polymers having different melt viscosities.
【０００２】[0002]
【従来の技術】溶融粘度が互いに異なる重合体をサイド
バイサイド型に複合紡糸するための口金は、たとえば図
８に示すように構成されている（たとえば、特開平９−
２０９２１７号公報）。すなわち、口金１０１に穿設さ
れた口金孔１０２内が、仕切板１０３によって２つの流
路１０４ａ、１０４ｂに画成され、各流路１０４ａ、１
０４ｂに、互いに溶融粘度の異なる溶融重合体がそれぞ
れ供給される。供給された両溶融重合体は、合流された
後吐出孔１０５から吐出され、サイドバイサイド型の複
合繊維として紡糸される。仕切板１０３は、口金孔１０
２の横断面内中央位置に配置され、口金孔１０２は、実
質的に、流路１０４ａと流路１０４ｂとに等流路断面積
にて２分されている。2. Description of the Related Art A spinneret for composite spinning of polymers having different melt viscosities into a side-by-side type is constructed, for example, as shown in FIG.
209217). That is, the inside of the die hole 102 formed in the die 101 is defined by the partition plate 103 into two channels 104a and 104b, and the channels 104a and 1
To 04b, melted polymers having different melt viscosities are respectively supplied. The two melted polymers supplied are merged and then discharged from the discharge hole 105, and spun as a side-by-side composite fiber. The partition plate 103 has a mouth hole 10
It is arranged at the center position in the cross section of 2, and the mouth hole 102 is substantially divided into the flow passage 104a and the flow passage 104b with an equal flow passage sectional area.
【０００３】上記のような従来の複合紡糸用口金１０１
においては、溶融紡糸される複合繊維に、吐出直後の曲
がりの問題と、糸断面形状のまゆ状化の問題がある。The conventional composite spinning die 101 as described above
In the above, the composite fiber to be melt-spun has a problem of bending immediately after discharge and a problem of eyebrows in the cross-sectional shape of the yarn.
【０００４】すなわち、たとえば図９に示すように、と
くに仕切板１０３の吐出孔側先端１０３ａが吐出孔１０
５よりも上流側に引っ込んで位置されている場合（仕切
板深度が長い場合）、仕切板１０３の先端１０３ａから
吐出孔１０５までの間で、合流した溶融重合体１０６
ａ、１０６ｂが円筒状の壁面に囲まれているため、図１
０に示すように糸の横断面１０７は円形またはそれに近
い形状となる。しかし、粘度差による両溶融重合体の速
度差のため、吐出孔１０５から吐出直後の糸に図９に示
すような曲がりが生じ、その曲がりによって糸切れが多
発するおそれがあり、生産性の悪化を招くおそれがあ
る。That is, as shown in FIG. 9, for example, the tip 103a of the partition plate 103 on the ejection hole side is particularly the ejection hole 10.
5 is positioned upstream of 5 (when the partition plate depth is long), the melted polymer 106 that has merged between the tip 103a of the partition plate 103 and the discharge hole 105.
Since a and 106b are surrounded by the cylindrical wall surface,
As shown in 0, the cross section 107 of the yarn has a circular shape or a shape close thereto. However, due to the difference in speed between the two molten polymers due to the difference in viscosity, the yarn immediately after being discharged from the discharge hole 105 may be bent as shown in FIG. 9, and the bending may cause frequent yarn breakage, resulting in deterioration of productivity. May be caused.
【０００５】また、たとえば図１１に示すように、とく
に仕切板１０３の吐出孔側先端１０３ａが吐出孔１０５
あるいはその近傍に位置されている場合（仕切板深度が
短い場合）、吐出孔１０５から吐出された直後の溶融重
合体１０６ａ、１０６ｂは、それぞれが表面張力により
丸くなろうとするため、図１２に示すように、吐出直後
の糸の横断面形状がまゆ状の形状となる。このようにま
ゆ状の形状１０８になると、糸強度が低下するおそれが
あり、目標とする糸品質の確保が難しくなる。Further, as shown in FIG. 11, for example, the tip 103a of the partition plate 103 on the ejection hole side is particularly the ejection hole 105.
Alternatively, when it is located in the vicinity thereof (when the partition plate depth is short), the molten polymers 106a and 106b immediately after being discharged from the discharge holes 105 tend to be rounded due to the surface tension, and therefore are shown in FIG. As described above, the cross-sectional shape of the yarn immediately after being discharged becomes an eyebrow shape. When the eyebrows-like shape 108 is formed in this way, the yarn strength may decrease, and it becomes difficult to secure the target yarn quality.
【０００６】[0006]
【発明が解決しようとする課題】そこで本発明の課題
は、上記のような問題点に着目し、口金から吐出直後の
曲がりと、糸断面形状のまゆ状化による糸強度低下とを
共に防止し、生産性と品質とを共に改善できる複合紡糸
用口金を提供することにある。併せて、本発明は、この
複合紡糸用口金を用いた複合紡糸用パックおよび複合紡
糸方法も提供する。Therefore, an object of the present invention is to prevent the bending just after the ejection from the spinneret and the decrease in the yarn strength due to the cocoon shape of the yarn cross section, paying attention to the above problems. Another object of the present invention is to provide a spinneret for composite spinning, which can improve both productivity and quality. At the same time, the present invention also provides a composite spinning pack and a composite spinning method using the composite spinning die.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に、本発明に係る複合紡糸用口金は、仕切板により口金
孔内に２つの流路を画成し、それぞれの流路に溶融重合
体を供給し、吐出孔から吐出してサイドバイサイド型の
複合繊維を紡糸する複合紡糸用口金であって、仕切板の
吐出孔側先端における各溶融重合体の流路断面積が互い
に異なっていることを特徴とするものからなる。In order to solve the above-mentioned problems, the spinneret for composite spinning according to the present invention defines two flow paths in the spinneret holes by means of a partition plate, and melt flow is carried out in each flow path. It is a spinneret for composite spinning that supplies a coalescence and discharges it from a discharge hole to spin a side-by-side type composite fiber, and the flow passage cross-sectional areas of each molten polymer at the discharge hole side tip of the partition plate are different from each other. It is characterized by.
【０００８】この複合紡糸用口金においては、仕切板が
下記関係式を満足するように配置されていることが好ま
しい。
１．１＜ＳL ／ＳH
ＳL ：大きいほうの前記流路断面積〔ｍｍ2〕
ＳH ：小さいほうの前記流路断面積〔ｍｍ2〕In this composite spinning die, it is preferable that the partition plates are arranged so as to satisfy the following relational expression. 1.1 <S L / S H S L : larger flow passage cross-sectional area [mm 2 ] S H : smaller flow passage cross-sectional area [mm 2 ]
【０００９】また、仕切板の吐出孔側先端における流路
画成線が、口金孔中心からずれていることが好ましい。
さらに、仕切板の吐出孔側先端が、溶融重合体の流れ方
向に関して吐出孔よりも上流側に位置していることが好
ましい。すなわち、仕切板の吐出孔側先端と吐出孔との
間に、吐出直後の複合繊維の曲がりや、糸断面形状のま
ゆ状化を防止するための、流れの修正区間が設けられる
ことが好ましい。Further, it is preferable that the flow path defining line at the tip of the partition plate on the discharge hole side is displaced from the center of the mouth hole.
Furthermore, it is preferable that the discharge hole side tip of the partition plate is located upstream of the discharge hole in the flow direction of the molten polymer. That is, it is preferable that a flow correction section is provided between the tip of the partition plate on the discharge hole side and the discharge hole so as to prevent the bending of the composite fiber immediately after the discharge and the formation of the eyebrows in the yarn cross-sectional shape.
【００１０】また、本発明に係る複合紡糸用口金におい
ては、仕切板の吐出孔側先端の厚みｔ〔ｍｍ〕と、吐出
孔径ｄ〔ｍｍ〕と、吐出孔から仕切板の吐出孔側先端ま
での距離ｓ〔ｍｍ〕とが下記関係式を満足していること
が好ましい。
ｔ≦０．２ｄ
ｓ≦０．５ｄFurther, in the spinneret for composite spinning according to the present invention, the thickness t [mm] of the tip of the partition plate on the discharge hole side, the discharge hole diameter d [mm], and the distance from the discharge hole to the tip of the partition plate on the discharge hole side. It is preferable that the distance s [mm] satisfies the following relational expression. t ≦ 0.2d s ≦ 0.5d
【００１１】本発明に係る複合紡糸用パックは、上記の
ような複合紡糸用口金を有することを特徴とするものか
らなる。A composite spinning pack according to the present invention is characterized by having the above-described composite spinning spinneret.
【００１２】また、本発明に係る複合紡糸方法は、上記
のような複合紡糸用口金の２つの流路に互いに粘度が異
なる溶融重合体を供給することを特徴とする方法からな
る。The composite spinning method according to the present invention comprises a method in which molten polymers having different viscosities are supplied to the two flow paths of the composite spinning die as described above.
【００１３】この複合紡糸方法においては、流路断面積
が大きいほうの流路に、粘度が低い溶融重合体を供給す
る。In this composite spinning method, a molten polymer having a low viscosity is supplied to the channel having the larger channel cross-sectional area.
【００１４】また、この複合紡糸方法においては、２つ
の流路にそれぞれ供給する溶融重合体の粘度差が下記関
係式を満足していることが好ましい。
２μL ≦μH
μL ：低粘度溶融重合体の溶融粘度〔ｐｏｉｓｅ〕
μH ：高粘度溶融重合体の溶融粘度〔ｐｏｉｓｅ〕Further, in this composite spinning method, it is preferable that the difference in viscosity between the melted polymers supplied to the two flow passages satisfies the following relational expression. 2 μ L ≦ μ H μ L : Melt viscosity of low-viscosity molten polymer [poise] μ H : Melt viscosity of high-viscosity molten polymer [poise]
【００１５】上記のような本発明に係る複合紡糸用口金
においては、複合紡糸用口金により口金孔内に画成され
る２つの流路の、仕切板の吐出孔側先端における流路断
面積が異ならしめられるので、粘度が互いに異なる溶融
重合体がそれぞれの流路に導入され、合流され、後吐出
孔から吐出された直後に、両溶融重合体からなる複合繊
維に曲がりを発生させたり、複合繊維の横断面形状をま
ゆ状化させたりする力が適切に緩和され、これら不都合
の発生が防止あるいは抑制される。とくに、仕切板の先
端と吐出孔との間に適切な修正区間を設ければ、吐出孔
から吐出される複合繊維の曲がりやまゆ状化はより確実
に防止される。その結果、吐出直後の複合繊維の曲がり
による生産性の低下、まゆ状化に起因する糸強度低下に
よる品質低下が適切に防止される。In the composite spinning spinneret according to the present invention as described above, the cross-sectional area of the two flow paths defined by the composite spinning spinneret inside the spinneret hole is the flow path cross-sectional area at the tip of the partition plate on the discharge hole side. Since they are made different, melted polymers having different viscosities are introduced into the respective flow paths, merged, and immediately after being discharged from the post discharge hole, the composite fiber made of both melted polymers is bent, The force that causes the cross-sectional shape of the fiber to be cocoon-shaped is appropriately relaxed, and the occurrence of these disadvantages is prevented or suppressed. In particular, if a proper correction section is provided between the tip of the partition plate and the discharge hole, the bending and the eyebrows of the composite fiber discharged from the discharge hole can be more reliably prevented. As a result, it is possible to appropriately prevent the productivity from being deteriorated due to the bending of the composite fiber immediately after the ejection, and the quality from being deteriorated due to the decrease in the yarn strength due to the eyebrows.
【００１６】[0016]
【発明の実施の形態】以下に、本発明の望ましい実施の
形態について、図面を参照して説明する。図１は、本発
明の一実施態様に係る複合紡糸用口金の仕切板下部と吐
出孔近傍および溶融重合体の流れの様子を示している。
図１（Ａ）において、１は、複合紡糸用口金全体を示し
ており、該口金１には、適当数の口金孔２が穿設されて
いる。口金孔２内には、適当な導入部を経て、粘度が互
いに異なる２つの溶融重合体３ａ、３ｂが供給され、両
溶融重合体３ａ、３ｂが合流され、吐出孔４から吐出さ
れることにより、図１（Ｃ）に示すような横断面形状を
有するサイドバイサイド型の複合繊維５が紡糸される。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state of a partition plate lower portion of a composite spinning die according to one embodiment of the present invention, the vicinity of a discharge hole, and a flow of a molten polymer.
In FIG. 1 (A), reference numeral 1 denotes the whole spinneret for composite spinning, and an appropriate number of spinneret holes 2 are formed in the spinneret 1. Two molten polymers 3a and 3b having different viscosities are supplied into the die hole 2 through an appropriate introduction part, and the two molten polymers 3a and 3b are merged and discharged from the discharge hole 4. The side-by-side type composite fiber 5 having a cross-sectional shape as shown in FIG. 1 (C) is spun.
【００１７】口金孔２内には仕切板６が設けられてお
り、仕切板６によって、口金孔２内が２つの流路、つま
り低粘度側溶融重合体３ａ用の流路７ａと、高粘度側溶
融重合体３ｂ用の流路７ｂとに画成されている。それぞ
れの流路７ａ、７ｂに供給された溶融重合体３ａ、３ｂ
は、仕切板６の先端６ａの位置を通過した直後に合流さ
れ、本実施態様では合流した後若干の修正区間８を通っ
た後、吐出孔４の出口からサイドバイサイド型の複合繊
維５として吐出される。なお、溶融重合体３ａ、３ｂの
粘度差は、２×低粘度側溶融重合体の溶融粘度（μL )
≦高粘度側溶融重合体の溶融粘度（μH ）となっている
ことが好ましい。A partition plate 6 is provided in the die hole 2, and the partition plate 6 allows two channels in the die hole 2, that is, a channel 7a for the low-viscosity side molten polymer 3a and a high viscosity. The flow path 7b for the side melt polymer 3b is defined. Molten polymer 3a, 3b supplied to the respective channels 7a, 7b
Are merged immediately after passing through the position of the tip 6a of the partition plate 6, and in this embodiment, after being merged and after passing through a slight correction section 8, they are discharged as side-by-side composite fibers 5 from the outlet of the discharge hole 4. It Incidentally, molten polymer 3a, viscosity difference. 3b, 2 × melt viscosity of the low viscosity side molten polymer (mu L)
It is preferable that the melt viscosity (μ H ) of the melt polymer on the high viscosity side is ≦.
【００１８】上記仕切板６は、その吐出孔側先端６ａの
位置における両溶融重合体３ａ、３ｂの流路７ａ、７ｂ
の断面積が互いに異なるように、すなわち、低粘度側溶
融重合体３ａ用の流路７ａの断面積（ＳL ）の方が、高
粘度側溶融重合体３ｂ用の流路７ｂの断面積（ＳH ）よ
りも大きくなるように配置されている。たとえば、１．
１＜ＳL ／ＳH を満足するように配置されている。本実
施態様では、図１（Ｂ）に示すように、この関係を満足
するように、横断面における形状が直線状の仕切板６が
設けられている。The partition plate 6 has channels 7a and 7b for the two molten polymers 3a and 3b at the position of the discharge hole side tip 6a.
Are different from each other, that is, the cross-sectional area (S L ) of the flow passage 7a for the low-viscosity side molten polymer 3a is smaller than the cross-sectional area (S L ) of the flow passage 7b for the high-viscosity side molten polymer 3b ( It is arranged to be larger than S H ). For example, 1.
It is arranged so as to satisfy 1 <S L / S H. In this embodiment, as shown in FIG. 1B, a partition plate 6 having a linear cross section is provided so as to satisfy this relationship.
【００１９】この流路断面積の大小関係は、口金孔２が
円形横断面を持たない場合にも、成立させる必要があ
る。たとえば図２に示すような異形横断面形状の口金孔
１１の場合にも、１．１＜ＳL ／ＳH を満足するように
仕切板１２を設けることが好ましい。The magnitude relationship of the flow passage cross-sectional areas must be established even when the mouthpiece hole 2 does not have a circular cross section. For example, even in the case of the die hole 11 having a modified cross-sectional shape as shown in FIG. 2, it is preferable to provide the partition plate 12 so as to satisfy 1.1 <S L / S H.
【００２０】また、仕切板の形状についても、横断面直
線状のものには限定されない。たとえば図３、図４に示
すように、横断面形状が湾曲した仕切板１３、１４にす
ることもできる。つまり、仕切板１３、１４の吐出孔側
先端における流路画成線が、口金孔１５、１６の横断面
の中心を通る直線からずれている形状に形成することが
できる。この場合にも、前記の１．１＜ＳL ／ＳH を満
足することが好ましい。Further, the shape of the partition plate is not limited to the one having a straight cross section. For example, as shown in FIGS. 3 and 4, partition plates 13 and 14 having a curved cross-sectional shape may be used. That is, the flow path defining line at the discharge hole side tips of the partition plates 13 and 14 can be formed in a shape deviating from the straight line passing through the centers of the cross sections of the mouthpiece holes 15 and 16. Also in this case, it is preferable that the above-mentioned 1.1 <S L / S H is satisfied.
【００２１】また、上記のような流路断面積の大小関係
は、基本的には、仕切板の吐出孔側先端において、つま
り２つの溶融重合体が合流する箇所において成立させれ
ばよい。その上流側では、必ずしも上記のような大小関
係が成立している必要はない。したがって、たとえば図
５に示すように、仕切板２１の肉厚を一方の流路側に片
寄ったテーパ状に形成し、仕切板２１の吐出孔２２側先
端においてのみ、各流路２３、２４の断面積に目標とす
る大小関係をもたせるように構成することができる。Further, the above-mentioned relationship of the cross-sectional area of the flow passages may be basically established at the tip of the partition plate on the discharge hole side, that is, at the location where the two molten polymers merge. On the upstream side, it is not necessary that the above-mentioned magnitude relationship is established. Therefore, for example, as shown in FIG. 5, the partition plate 21 is formed so as to have a taper shape that is offset toward one flow path side, and the flow paths 23 and 24 are cut off only at the tip of the partition plate 21 on the discharge hole 22 side. The area can be configured to have a target size relationship.
【００２２】また、本発明においては、仕切板の先端か
ら吐出孔までの間に、吐出直後の複合繊維の曲がりやま
ゆ状化を防止するための、合流した両溶融重合体の横断
面形状の修正区間を設けておくことが好ましい。この修
正区間においては、次のような関係を満足することが好
ましい。Further, in the present invention, between the tip of the partition plate and the discharge hole, the cross-sectional shape of the two merged molten polymers for preventing bending and cocoon formation of the composite fiber immediately after discharge is formed. It is preferable to provide a correction section. It is preferable that the following relationship be satisfied in this correction section.
【００２３】たとえば図６、図７に示すように、仕切板
３１の吐出孔３２側の先端３１ａと口金３３の下面３３
ａ（吐出孔の出口）との距離をｓ（ｍｍ）吐出孔径をｄ
（ｍｍ）、仕切板３１の先端３１ａの厚さをｔ（ｍｍ）
とするとき、
ｔ≦０．２ｄ
ｓ≦０．５ｄ
を満足することが好ましい。For example, as shown in FIGS. 6 and 7, the tip 31a of the partition plate 31 on the discharge hole 32 side and the lower surface 33 of the mouthpiece 33.
The distance from a (the outlet of the discharge hole) is s (mm) and the diameter of the discharge hole is d
(Mm), the thickness of the tip 31a of the partition plate 31 is t (mm)
Then, it is preferable that t ≦ 0.2 d s ≦ 0.5 d is satisfied.
【００２４】上記のように構成される複合紡糸用口金の
作用について、図１を参照しながら説明する。図１
（Ａ）に示すように、仕切板６により、低粘度側溶融重
合体用流路７ａの断面積がより大きく、高粘度側溶融重
合体用流路７ｂの断面積がより小さく形成されているの
で、流路７ａではより低流速に、流路７ｂではより高流
速となり、仕切板６の先端６ａを出た直後には、低粘度
溶融重合体３ａはその横断面積が縮小するように、高粘
度溶融重合体３ｂは、その横断面積が拡大するように合
流し、吐出孔４の出口では、丁度図１（Ｃ）に示すよう
に理想的な半円同士が合体された複合繊維５となる。と
くに、上記仕切板先端６ａから吐出孔４に至る修正区間
８にて、吐出直後に曲がりを発生させる力およびまゆ状
化する力が緩和され、現実に吐出孔４から吐出される溶
融重合体３ａ、３ｂからなる複合繊維５に曲がりが生じ
ることは防止され、横断面形状がまゆ状化されることも
防止される。その結果、曲がり発生による生産性の低
下、まゆ状化による糸強度低下が防止される。The operation of the spinneret for composite spinning configured as described above will be described with reference to FIG. Figure 1
As shown in (A), the partition plate 6 is formed so that the cross-sectional area of the low-viscosity-side molten polymer channel 7a is larger and the cross-sectional area of the high-viscosity-side molten polymer channel 7b is smaller. Therefore, the flow velocity in the flow passage 7a becomes lower, and the flow velocity in the flow passage 7b becomes higher. Immediately after leaving the tip 6a of the partition plate 6, the low-viscosity molten polymer 3a has a high cross-sectional area so that the cross-sectional area thereof is reduced. The viscous molten polymer 3b merges so that its cross-sectional area increases, and at the exit of the discharge hole 4, the ideal semicircle 5 becomes a conjugate fiber 5 that is just united as shown in FIG. 1 (C). . In particular, in the correction section 8 extending from the partition plate tip 6a to the discharge hole 4, the force that causes bending immediately after discharge and the force that forms an eyebrows are relaxed, and the molten polymer 3a that is actually discharged from the discharge hole 4 is reduced. Bending of the composite fiber 5 composed of 3b is prevented, and the cross-sectional shape of the conjugate fiber 5 is also prevented from becoming eyebrows. As a result, a decrease in productivity due to the occurrence of bending and a decrease in yarn strength due to eyebrows are prevented.
【００２５】[0025]
【発明の効果】以上説明したように、本発明の複合紡糸
用口金によれば、口金から吐出直後の曲がりと、糸断面
形状のまゆ状化による糸強度低下が共に効果的に防止さ
れ、生産性の向上と糸品質の改善とを共に効率よく達成
することができる。As described above, according to the spinneret for composite spinning of the present invention, both the bending immediately after discharging from the spinneret and the decrease in yarn strength due to the cocoon-like shape of the yarn cross section are effectively prevented, and the production is improved. It is possible to efficiently achieve both the improvement in yarn quality and the improvement in yarn quality.
【図１】本発明の一実施態様に係る複合紡糸用口金の部
分構成図である。FIG. 1 is a partial configuration diagram of a spinneret for composite spinning according to an embodiment of the present invention.
【図２】仕切板による流路画成の別の例を示す口金孔の
横断面図である。FIG. 2 is a cross-sectional view of a mouth hole showing another example of flow path definition by a partition plate.
【図３】仕切板による流路画成のさらに別の例を示す口
金孔の横断面図である。FIG. 3 is a cross-sectional view of a mouth hole showing still another example of flow path definition by a partition plate.
【図４】仕切板による流路画成のさらに別の例を示す口
金孔の横断面図である。FIG. 4 is a cross-sectional view of a mouth hole showing still another example of flow path definition by a partition plate.
【図５】本発明の別の実施態様に係る複合紡糸用口金の
部分縦断面図である。FIG. 5 is a partial longitudinal sectional view of a spinneret for composite spinning according to another embodiment of the present invention.
【図６】本発明における好ましい位置関係を示す複合紡
糸用口金の部分縦断面図である。FIG. 6 is a partial vertical cross-sectional view of a spinneret for composite spinning showing a preferable positional relationship in the present invention.
【図７】図６の口金の部分横断面図である。7 is a partial cross-sectional view of the die of FIG.
【図８】従来の複合紡糸用口金の部分縦断面図である。FIG. 8 is a partial vertical sectional view of a conventional spinneret for composite spinning.
【図９】従来の口金における問題点を示す部分縦断面図
である。FIG. 9 is a partial vertical cross-sectional view showing a problem in a conventional die.
【図１０】図９の口金により吐出された複合繊維の横断
面図である。10 is a cross-sectional view of the composite fiber discharged by the die of FIG.
【図１１】従来の口金における別の問題点を示す部分縦
断面図である。FIG. 11 is a partial vertical cross-sectional view showing another problem in the conventional die.
【図１２】図１１の口金により吐出された複合繊維の横
断面図である。12 is a cross-sectional view of the composite fiber discharged by the die of FIG.
１、３３ 複合紡糸用口金 ２、１１、１５、１６ 口金孔 ３ａ、３ｂ 溶融重合体 ４、２２、３２ 吐出孔 ５ 複合繊維 ６、１２、１３、１４、２１、３１ 仕切板 ６ａ、３１ａ 仕切板の先端 ７ａ、７ｂ、２３、２４ 溶融重合体用流路 ８ 修正区間 ３３ａ 口金の下面 1,33 Composite spinneret 2, 11, 15, 16 mouthpiece holes 3a, 3b Melt polymer 4, 22, 32 Discharge hole 5 composite fiber 6, 12, 13, 14, 21, 31 Partition plate 6a, 31a Tip of partition plate 7a, 7b, 23, 24 Melt polymer flow path 8 modified sections 33a Bottom surface of base
───────────────────────────────────────────────────── フロントページの続き (72)発明者 古田 裕基 滋賀県大津市園山１丁目１番１号 東レ株 式会社滋賀事業場内 Ｆターム(参考） 4L045 AA05 BA21 CB16 CB21 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Yuuki Furuta 1-1 1-1 Sonoyama, Otsu City, Shiga Prefecture Toray Co., Ltd. Ceremony company Shiga business site F-term (reference) 4L045 AA05 BA21 CB16 CB21
Claims (9)
成し、それぞれの流路に溶融重合体を供給し、吐出孔か
ら吐出してサイドバイサイド型の複合繊維を紡糸する複
合紡糸用口金であって、仕切板の吐出孔側先端における
各溶融重合体の流路断面積が互いに異なっていることを
特徴とする複合紡糸用口金。1. A composite spinning process in which two flow paths are defined in a spinneret hole by a partition plate, a molten polymer is supplied to each flow path, and a side-by-side type composite fiber is spun by discharging from a discharge hole. A spinneret for composite spinning, wherein the melt polymer has different flow passage cross-sectional areas at the discharge hole side tip of the partition plate.
置されている、請求項１に記載の複合防止用口金。 １．１＜ＳL ／ＳH ＳL ：大きいほうの前記流路断面積〔ｍｍ2〕 ＳH ：小さいほうの前記流路断面積〔ｍｍ2〕2. The composite prevention die according to claim 1, wherein the partition plate is arranged so as to satisfy the following relational expression. 1.1 <S L / S H S L : larger flow passage cross-sectional area [mm 2 ] S H : smaller flow passage cross-sectional area [mm 2 ]
線が、口金孔中心からずれている、請求項１または２に
記載の複合紡糸用口金。3. The spinneret for composite spinning according to claim 1, wherein the flow path defining line at the tip of the partition plate on the discharge hole side is displaced from the center of the spinneret hole.
流れ方向に関して吐出孔よりも上流側に位置している、
請求項１〜３のいずれかに記載の複合紡糸用口金。4. The end of the partition plate on the discharge hole side is located upstream of the discharge hole in the flow direction of the molten polymer.
The spinneret for composite spinning according to claim 1.
と、吐出孔径ｄ〔ｍｍ〕と、吐出孔から仕切板の吐出孔
側先端までの距離ｓ〔ｍｍ〕とが下記関係式を満足して
いる、請求項１〜４のいずれかに記載の複合紡糸用口
金。 ｔ≦０．２ｄ ｓ≦０．５ｄ5. The thickness t [mm] of the tip of the partition plate on the discharge hole side.
And the discharge hole diameter d [mm] and the distance s [mm] from the discharge hole to the discharge hole side tip of the partition plate satisfy the following relational expression. Spinneret for spinning. t ≦ 0.2d s ≦ 0.5d
糸用口金を有することを特徴とする複合紡糸用パック。6. A composite spinning pack comprising the composite spinning die according to any one of claims 1 to 5.
糸用口金の２つの流路に互いに粘度が異なる溶融重合体
を供給することを特徴とする複合紡糸用口金。7. A spinneret for composite spinning, characterized in that molten polymers having different viscosities are supplied to two channels of the spinneret for composite spinning according to any one of claims 1 to 5.
が低い溶融重合体を供給する、請求項７に記載の複合紡
糸方法。8. The composite spinning method according to claim 7, wherein the melted polymer having a low viscosity is supplied to the flow passage having the larger flow passage cross-sectional area.
体の粘度差が下記関係式を満足している、請求項７また
は８に記載の複合紡糸方法。 ２μL ≦μH μL ：低粘度溶融重合体の溶融粘度〔ｐｏｉｓｅ〕 μH ：高粘度溶融重合体の溶融粘度〔ｐｏｉｓｅ〕9. The composite spinning method according to claim 7, wherein the difference in viscosity of the molten polymer supplied to each of the two flow paths satisfies the following relational expression. 2 μ L ≦ μ H μ L : Melt viscosity of low-viscosity molten polymer [poise] μ H : Melt viscosity of high-viscosity molten polymer [poise]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001279677A JP2003089919A (en) | 2001-09-14 | 2001-09-14 | Spinneret for conjugate spinning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001279677A JP2003089919A (en) | 2001-09-14 | 2001-09-14 | Spinneret for conjugate spinning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003089919A true JP2003089919A (en) | 2003-03-28 |
| JP2003089919A5 JP2003089919A5 (en) | 2008-10-16 |
Family
ID=19103817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001279677A Withdrawn JP2003089919A (en) | 2001-09-14 | 2001-09-14 | Spinneret for conjugate spinning |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003089919A (en) |
-
2001
- 2001-09-14 JP JP2001279677A patent/JP2003089919A/en not_active Withdrawn
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